There are parts of the city that are just really nasty. People are murderously aggressive on the roads. They never smile anywhere, never have time for anyone, i

There are parts of the city that are just really nasty. People are murderously aggressive on the roads. They never smile anywhere, never have time for anyone, including their closest family members. They seek entertainment as an escape, then get into addictions. I think that affects the mental state of those who are just immersed in those environments. When literally everyone you meet is an asshole, you end up thinking that way of the world, and in many people, they become part of the problem as well. It's not limited to cities or urban density. I think it's self-selective. I noticed the attitude is worst in financial districts or hardcore poor areas. I would bet certain high paying tech districts might be similar too. Outside of a certain city core, you do have exponentially more places to pick where to live. So the self-selection effect might also fall differently. Someone who chooses to live in an area with nice gardens might have a different personality to someone who chooses an expensive condominium.